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Annotation of OpenXM_contrib/gmp/mpfr/mul_2exp.c, Revision 1.1.1.1

1.1       maekawa     1: /* mpfr_mul_2exp -- multiply a floating-point number by a power of two
                      2:
                      3: Copyright (C) 1999 PolKA project, Inria Lorraine and Loria
                      4:
                      5: This file is part of the MPFR Library.
                      6:
                      7: The MPFR Library is free software; you can redistribute it and/or modify
                      8: it under the terms of the GNU Library General Public License as published by
                      9: the Free Software Foundation; either version 2 of the License, or (at your
                     10: option) any later version.
                     11:
                     12: The MPFR Library is distributed in the hope that it will be useful, but
                     13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
                     15: License for more details.
                     16:
                     17: You should have received a copy of the GNU Library General Public License
                     18: along with the MPFR Library; see the file COPYING.LIB.  If not, write to
                     19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     20: MA 02111-1307, USA. */
                     21:
                     22: #include <stdio.h>
                     23: #include "gmp.h"
                     24: #include "gmp-impl.h"
                     25: #include "mpfr.h"
                     26:
                     27: void
                     28: #if __STDC__
                     29: mpfr_mul_2exp(mpfr_ptr y, mpfr_srcptr x, unsigned long int n, unsigned char rnd_mode)
                     30: #else
                     31: mpfr_mul_2exp(y, x, n, rnd_mode)
                     32:      mpfr_ptr y;
                     33:      mpfr_srcptr x;
                     34:      unsigned long int n;
                     35:      unsigned char rnd_mode;
                     36: #endif
                     37: {
                     38:   /* Important particular case */
                     39:   if (y != x) mpfr_set(y, x, rnd_mode);
                     40:   EXP(y) += n;
                     41:   return;
                     42: }
                     43: